Choroidal suture fixation device

Abstract

The choroid suture fixing device comprises a pusher, a front-end suture nail, a plurality of middle suture nails, a rear-end suture nail and a suture thread; the pusher comprises a pusher barrel and a pusher rod, the pusher barrel is open at the front end, the pusher rod is inserted in the pusher barrel and axially penetrates the rear middle part of the pusher barrel; the rear side end of the front-end suture nail, the plurality of middle suture nails and the rear-end suture nail is provided with a threading hole, the front end of the suture thread is fixed on the threading hole of the front-end suture nail, the middle section penetrates the threading holes of the middle suture nails in sequence and the rear end is fixed on the threading hole of the rear-end suture nail; the front-end suture nail, the plurality of middle suture nails and the rear-end suture nail with the suture thread are respectively arranged in the front middle part of the pusher barrel and arranged at the front end, the middle section and the rear end in sequence, and the forces are mutually cooperative when they are sutured and fixed on the choroid, so that the force of the whole choroid suture fixing part is uniform, the fixation is more firm and stable and the device can be operated by one hand.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ophthalmic medical devices, in particular to a choroid suture fixing device. BACKGROUND

[0002] Choroid is a soft, smooth, elastic and vascular brown film between the retina and the sclera. It originates from the anterior serrated edge and stops at the periphery of the optic nerve; the inner surface is connected with the pigment epithelial layer of the retina by a very smooth glass membrane, and the outer surface is connected with the sclera by a potential gap, with fine fiber plates of the choroid pericyte layer extending and mixing into the sclera brown-black plate, and blood vessels and nerves passing through. Choroid is mainly composed of blood vessels, and its thickness often varies greatly due to the filling state of the blood vessels. According to general measurement, the anterior part of the choroid is about 0.1 mm thick, the posterior part is about 0.22 mm thick, and the macular part is particularly thick. The main function of the choroid is to nourish the outer layer of the retina, which is equivalent to the soft meninges and arachnoid mater that supply nutrients to the brain; secondly, it can block the light that penetrates into the sclera into the eye to ensure clear imaging. Embryologically, the choroid is derived from the mesoderm and neural ectoderm, and the choroidal sinus, vascular layer and elastic tissue of the choroid are derived from the mesoderm; the pigment epithelial layer and the nine layers inside the retina are derived from the neural ectoderm. Histologically, the choroid is divided into five layers: choroid pericyte layer, large blood vessel layer, middle blood vessel layer, capillary blood vessel layer and glass membrane.

[0003] However, in real life, choroidal detachment, also known as cilio-choroid detachment, can occur due to various reasons. The connection between the ciliary body and choroid and the sclera is loose except at the scleral spur and vortex vein, forming a potential gap. When the intraocular pressure drops after surgery or trauma, the choroidal blood vessels can expand and leak; or the choroid can be separated from the sclera due to inflammatory exudates and traction of the intravitreal organization cord, which is called choroidal detachment. When choroidal detachment occurs, ciliary detachment usually occurs, which is commonly referred to as choroidal detachment. Clinically, choroidal detachment can be divided into primary and secondary types according to its cause; according to the fundus morphology, it can be divided into ring-shaped, lobular and flat choroidal detachment. In addition to finding the cause, the wound should be closed and pressure bandaged, and mydriatic agents should be dropped. If it is ineffective, an incision can be made on the sclera to release the sub-choroidal fluid, and physiological saline can be injected into the anterior chamber or vitreous body to promote choroidal repositioning.

[0004] Between the uvea and the sclera, except for the tight fit at the exit of the vortex vein, the rest is loose connection, in the case of intraocular pressure after surgery or trauma, the choroidal blood vessels can be expanded and produce exudation; or there is traction in the vitreous, can make the choroid from the sclera separate from the inner surface, forming choroidal detachment. This is more common in the elderly after cataract extraction or anti-glaucoma surgery. Inflammation and hemorrhage can also cause choroidal detachment. The clinical manifestations are full and elevated in the peripheral part of the fundus, which can be spherical, lobulated or ring-shaped. The simultaneous detachment of the pars plana affects the aqueous humor production, so the intraocular pressure cannot be restored for a long time. Treatment should first close the wound, pressure bandage, and drop the mydriatic agent. If it is ineffective, a sclerotomy can be made on the sclera to release the subchoroidal effusion, and then physiological saline can be injected into the anterior chamber or vitreous to promote the reposition of the choroid. When choroidal detachment is accompanied by choroidal rupture, the high elasticity of the choroid makes it extremely difficult to reposition.

[0005] Currently, in practical applications, the suture of the choroid is generally performed by using polypropylene suture thread (suture of the anterior choroid) or a single scleral nail is injected by a pusher to fix the posterior choroid. However, the existing suture method is independent of the force of each scleral nail, and each scleral nail is used to fix the suture position respectively, and the position without the scleral nail can only rely on the tension of the choroid itself. This will lead to uneven force on the entire sutured choroid, and the fixation after suture is slightly insufficient. The choroid under tension for a long time will gradually loosen from the fixed scleral nail, which not only affects the surgical effect after suture, but also affects the rehabilitation of the patient in the later stage. The space between the scleral nails and the choroid and the sclera is easy to form a water leakage gap, which causes the choroid to be difficult to reposition.

[0006] In view of the above defects in the prior art, the present application is produced. SUMMARY

[0007] To solve the above technical problems, we propose a choroid suture fixing device, which is easy to operate, can be controlled by one hand, and can make the force of the scleral nails fixed on the choroid mutually cooperative, so that the entire choroid suture fixing part is evenly stressed, and the fixation is more stable.

[0008] To achieve the above purpose, the technical scheme of the present application is as follows:

[0009] A choroid suture fixing device, comprising a pusher, a plurality of suture nails and suture threads; the pusher comprises a pusher barrel and a pusher rod, the pusher barrel is a cylindrical hollow structure, and the front end of the pusher barrel is open; the pusher rod is inserted into the pusher barrel, and the pusher rod axially penetrates the rear middle part of the pusher barrel;

[0010] The plurality of stitching nails comprises a front-end stitching nail, a plurality of middle stitching nails and a rear-end stitching nail, and the rear side end of the front-end stitching nail, the plurality of middle stitching nails and the rear-end stitching nail is provided with a threading hole, the front end of the suture is fixed on the threading hole of the front-end stitching nail, and the middle section of the suture is sequentially and movably threaded through the threading holes of the middle stitching nails, and the rear end of the suture is fixed on the threading hole of the rear-end stitching nail;

[0011] The front-end stitching nail, the plurality of middle stitching nails and the rear-end stitching nail are arranged in the front middle part of the push-in barrel along the front opening of the push-in barrel with the suture, the front-end stitching nail is located at the frontmost position, the middle stitching nails are located at the middle section, and the rear-end stitching nail is located at the last position.

[0012] Preferably, the stitching nail is made of titanium alloy material, and the front end of the stitching nail is provided with a barb.

[0013] Preferably, the front part of the stitching nail is provided with a thread on the outer periphery.

[0014] Preferably, the rear end of the stitching nail is provided with a groove, and the top end of the push-in rod is provided with a protrusion.

[0015] According to the above technical scheme, when the choroid is stitched, the two ends of the suture are fixed on the rear side end threading holes of the front-end stitching nail and the rear-end stitching nail respectively, and the middle section of the suture is sequentially threaded through the rear side end threading holes of the middle stitching nails, so that when the front-end stitching nail, the plurality of middle stitching nails and the rear-end stitching nail are stitched and fixed to the choroid with the suture, the suture connects the front-end stitching nail, the middle stitching nails and the rear-end stitching nail into a whole, which is equivalent to fixing the choroid as a whole, the fixation of the front-end stitching nail, the plurality of middle stitching nails and the rear-end stitching nail to the choroid not only has a longitudinal force, but also has a transverse force through the pulling of the suture, so that the forces of the scleral nails fixed on the choroid are integrated, the force of the whole choroid stitching and fixing part is uniform, the possibility of water leakage between the choroid and the sclera is reduced, and the fixation is more reliable and stable. Moreover, the operation is convenient, and a single hand can control, so that the design is novel, the structure is reasonable, and the stitching effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0017] Figure 1 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0018] Figure 2 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0019] Figure 3 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0020] Figure 4 A front view of a front-end suturing nail of a choroid suturing fixation device according to an embodiment of the present application;

[0021] Figure 5 A top view of a front-end suturing nail of a choroid suturing fixation device according to an embodiment of the present application;

[0022] Figure 6 A side view of a front-end suturing nail of a choroid suturing fixation device according to an embodiment of the present application.

[0023] Figure 7 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0024] Figure 8 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0025] Figure 9 A cross-sectional view of a choroid suturing fixation device according to an embodiment of the present application;

[0026] Figure 10 A front view of a front-end suturing nail of a choroid suturing fixation device according to an embodiment of the present application;

[0027] Figure 11 A top view of a front-end suturing nail of a choroid suturing fixation device according to an embodiment of the present application.

[0028] Corresponding component names indicated by numbers in the figures:

[0029] 1. pusher 11. pusher 12. pusher rod 2. front-end suturing nail 3. middle suturing nail 4. rear-end suturing nail 5. suturing thread 6. threading hole 7. groove 8. protrusion 9. choroid 13. barb 14. thread DETAILED DESCRIPTION

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0032] Example 1.

[0033] like Figures 1-6 As shown, a choroidal suture fixation device includes an injection device 1, a front suture staple 2, three intermediate suture staples 3, a rear suture staple 4, and suture 5; the injection device 1 includes an injection cylinder 11 and an injection rod 12, the injection cylinder 11 is a cylindrical hollow structure, and the front end of the injection cylinder 11 is open, the injection rod 12 is inserted inside the injection cylinder 11, and the injection rod 12 axially passes through the rear middle part of the injection cylinder 11;

[0034] The rear ends of the front suture staple 2, the middle suture staple 3 and the rear suture staple 4 are all provided with thread holes 6. The front end of the suture 5 is fixed in the thread hole 6 of the front suture staple 2, and the middle section of the suture 5 passes through the thread hole 6 of the middle suture staple 3 in sequence. The middle section of the suture 5 is not fixed at the contact point with the thread hole 6 of the middle suture staple 3. The rear end of the suture 5 is fixed in the thread hole 6 of the rear suture staple 4.

[0035] The front suture 2, the middle suture 3, and the rear suture 4, along with the suture 5, are respectively inserted into the front middle part of the injection cylinder 11 through the front opening, with the front suture 2 at the foremost position, the middle suture 3 in the middle section, and the rear suture 4 at the very back.

[0036] Meanwhile, in order to prevent the front end suture 2, the middle suture 3 and the rear end suture 4 from springing back after fixing, and to increase the fixing firmness between the front end of the front end suture 2, the middle suture 3 and the rear end suture 4 and the choroid 9, the front end suture 2, the middle suture 3 and the rear end suture 4 are all made of titanium alloy, and each of them has barbs 13 at its front end.

[0037] The front suture 2, the middle suture 3, and the rear suture 4 are all provided with a groove 7 at the middle of their rear ends, and the top of the injection rod 12 is provided with a protrusion 8. In this way, when the injection rod 12 pushes the front suture 2, the middle suture 3, and the rear suture 4 forward, the protrusion 8 at the top of the injection rod 12 can be pushed towards the groove 7 at the middle of the rear ends of the front suture 2, the middle suture 3, and the rear suture 4, so that the pushing force is more precise and in place, thereby allowing the front suture 2, the middle suture 3, and the rear suture 4 to accurately enter the position to be sutured in the choroid.

[0038] Example 2.

[0039] like Figures 7-11 As shown, a choroidal suture fixation device includes an injection device 1, a front suture staple 2, a middle suture staple 3, a rear suture staple 4, and a suture 5; the injection device 1 includes an injection cylinder 11 and an injection rod 12. The injection cylinder 11 is a cylindrical hollow structure with an open front end. The injection rod 12 is inserted inside the injection cylinder 11 and axially passes through the rear middle part of the injection cylinder 11.

[0040] The rear ends of the front suture staple 2, the middle suture staple 3 and the rear suture staple 4 are all provided with thread holes 6. The front end of the suture 5 is fixed in the thread hole 6 of the front suture staple 2, and the middle section of the suture 5 passes through the thread hole 6 of the middle suture staple 3 in sequence. The middle section of the suture 5 is not fixed at the contact point with the thread hole 6 of the middle suture staple 3. The rear end of the suture 5 is fixed in the thread hole 6 of the rear suture staple 4.

[0041] The front suture 2, the middle suture 3, and the rear suture 4, along with the suture 5, are respectively inserted into the front middle part of the injection cylinder 11 through the front opening, with the front suture 2 at the foremost position, the middle suture 3 in the middle section, and the rear suture 4 at the very back.

[0042] Meanwhile, in order to prevent the front end suture 2, the middle suture 3 and the rear end suture 4 from springing back after being fixed, and to increase the fixing firmness between the front end of the front end suture 2, the three middle suture 3 and the rear end suture 4 and the choroid 9, the front end suture 2, the middle suture 3 and the rear end suture 4 are provided with threads 14 on the front outer periphery.

[0043] The rear middle part of the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 is provided with a groove 7, and the top end of the push injection rod 12 is provided with a protrusion 8. Thus, when the push injection rod 12 pushes the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 forward, the top end protrusion 8 of the push injection rod 12 can be pushed to the position of the rear middle part groove 7 of the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4, and the pushing force is more accurate, so that the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 accurately enter the suture position of the choroid.

[0044] In the above two embodiments, when the choroid 9 is sutured, the two ends of the suture line 5 are fixed on the rear side end threading hole 6 of the front end suture nail 2 and the rear end suture nail 4 respectively, and the middle section of the suture line 5 is sequentially threaded through the rear side end threading hole 6 of the middle suture nail 3. Thus, when the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 are sutured and fixed to the choroid 9 with the suture line 5, the suture line 5 connects the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 into a whole, which is equivalent to forming an overall fixation of the choroid 9. The fixation of the front end suture nail 2, the middle suture nail 3 and the rear end suture nail 4 on the choroid 9 not only has a longitudinal force, but also has a transverse force through the pulling of the suture line 5. The force of the scleral nail sutured and fixed on the choroid 9 is integrated, so that the force of the entire choroid 9 sutured and fixed part is uniform, and the fixation is more reliable and stable. In actual application, the doctor can operate it with one hand, which further achieves the purpose of novel design, reasonable structure and good suture effect.

[0045] The above is only one preferred embodiment of the choroid suture fixation device of the present application, and it should be noted that for those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the present application.

Claims

1. A choroid suturing fixation device, characterized by, The application relates to a push-in device, a plurality of suture nails and a suture line; the push-in device comprises a push-in barrel and a push-in rod; the push-in barrel is a cylindrical hollow barrel body, the front end of the push-in barrel is open, the push-in rod is arranged in the push-in barrel and axially penetrates the rear middle part of the push-in barrel; the plurality of suture nails comprise a front-end suture nail, a plurality of middle suture nails and a rear-end suture nail; the rear side of the front-end suture nail, the plurality of middle suture nails and the rear-end suture nail are provided with thread holes; the front end of the suture line is fixed on the thread hole of the front-end suture nail; the middle section of the suture line is sequentially and movably penetrated through the thread holes of the middle suture nails; and the rear end of the suture line is fixed on the thread hole of the rear-end suture nail; the front-end suture nail, the plurality of middle suture nails and the rear-end suture nail are arranged in the front middle part of the push-in barrel along the front opening of the push-in barrel with the suture line; the front-end suture nail is located at the frontmost position; the middle suture nails are located at the middle section; and the rear-end suture nail is located at the rearmost position.

2. The choroid suturing and fixing device according to claim 1, wherein, The suture nail is made of titanium alloy and is provided with a barb at the front end.

3. The choroid suturing and fixing device according to claim 1, wherein The front part of the suture nail is provided with a thread on the outer periphery.

4. A choroid suturing fixation device according to claim 2 or 3, characterized in that The rear end of the suture nail is provided with a groove; and the top end of the push-in rod is provided with a protrusion.

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